Describe the unique appearance of diatoms. what chemical compound composes their outer covering, and what is this shell called? how does the diatoms' habitat enable them to photosynthesize?

In which of the following relationships is one organism always benefited while the other organism is always harmed

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.

The combining form leuk/o means red true or false